1. Signaling Pathways
  2. Apoptosis
  3. TNF Receptor

TNF Receptor

Tumor Necrosis Factor Receptor; TNFR

Tumor necrosis factor (TNF) is a major mediator of apoptosis as well as inflammation and immunity, and it has been implicated in the pathogenesis of a wide spectrum of human diseases, including sepsis, diabetes, cancer, osteoporosis, multiple sclerosis, rheumatoid arthritis, and inflammatory bowel diseases.

TNF-α is a 17-kDa protein consisting of 157 amino acids that is a homotrimer in solution. In humans, the gene is mapped to chromosome 6. Its bioactivity is mainly regulated by soluble TNF-α–binding receptors. TNF-α is mainly produced by activated macrophages, T lymphocytes, and natural killer cells. Lower expression is known for a variety of other cells, including fibroblasts, smooth muscle cells, and tumor cells. In cells, TNF-α is synthesized as pro-TNF (26 kDa), which is membrane-bound and is released upon cleavage of its pro domain by TNF-converting enzyme (TACE).

Many of the TNF-induced cellular responses are mediated by either one of the two TNF receptors, TNF-R1 and TNF-R2, both of which belong to the TNF receptor super-family. In response to TNF treatment, the transcription factor NF-κB and MAP kinases, including ERK, p38 and JNK, are activated in most types of cells and, in some cases, apoptosis or necrosis could also be induced. However, induction of apoptosis or necrosis is mainly achieved through TNFR1, which is also known as a death receptor. Activation of the NF-κB and MAPKs plays an important role in the induction of many cytokines and immune-regulatory proteins and is pivotal for many inflammatory responses.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-W015490S
    1,4-Naphthoquinone-d6
    Inhibitor 99.20%
    1,4-Naphthoquinone-d6 is the deuterium labeled 1,4-Naphthoquinone. 1,4-Naphthoquinone is an inhibitor with broad-spectrum inhibitory activity targeting DNA polymerase, NF-κB and monoamine oxidase (MAO-A/B), with antibacterial and anti-biofilm efficacy. 1,4-Naphthoquinone is a competitive inhibitor of MAO-B (Ki=1.4 μM) and a non-competitive inhibitor of MAO-A (Ki=7.7 μM). 1,4-Naphthoquinone inhibits DNA polymerase pol α, β, γ, δ, ε, λ with IC50 ranging from 5.57-128 μM. 1,4-Naphthoquinone inhibits tumor cell proliferation, induces apoptosis and necrosis, and has anti-angiogenic and anti-inflammatory activities by inducing oxidative stress, depleting glutathione (GSH), inhibiting DNA polymerase-mediated DNA synthesis and blocking NF-κB nuclear translocation. 1,4-Naphthoquinone can be used in anti-bacterial , anti-tumor and anti-inflammatory studies, including inhibition of melanoma and colon cancer cell growth and endothelial cell function, as well as LPS-induced inflammation models.
    1,4-Naphthoquinone-d<sub>6</sub>
  • HY-N6607R
    Tryptanthrin (Standard)
    Modulator
    Tryptanthrin (Standard) is the analytical standard of Tryptanthrin. This product is intended for research and analytical applications. Tryptanthrin is an indole quinazoline that could be an alkaloid from indigo-bearing plants. Tryptanthrin is a potent and orally active cellular Leukotriene (LT) biosynthesis inhibitor. Tryptanthrin has anticancer activity. Tryptanthrin suppresses the expression levels of NOS1, COX-2, and NF-κB and regulates the expression levels of IL-2, IL-10, and TNF-α.
    Tryptanthrin (Standard)
  • HY-175222
    GlcNAc-MurNAc
    Inhibitor
    GlcNAc-MurNAc, a disaccharide, is a TLR4 agonist with a Kd of 383 μM for murine TLR4. GlcNAc-MurNAc directly binds to TLR4 and activates its downstream NF-κB and IRF pathways. GlcNAc-MurNAc improves Dextran sulfate sodium salt (DSS) (HY-116282C)-induced colitis in mice through a TLR4-dependent mechanism. GlcNAc-MurNAc can be used for the study of inflammatory bowel disease.
    GlcNAc-MurNAc
  • HY-161016
    TNF/IFN-γ-IN-1
    Inhibitor 99.39%
    TNF/IFN-γ-IN-1 (compound TGA) is a dual inhibitor of TNF and IFN-γ. TNF/IFN-γ-IN-1 can used in study Alzheimer’s disease.
    TNF/IFN-γ-IN-1
  • HY-111326
    Naphazoline
    Inhibitor 99.74%
    Naphazoline (Naphthazoline) is a potent α-adrenergic receptor agonist. Naphazoline reduces vascular hyperpermeability and promotes vasoconstriction. Naphazoline reduces the levels of inflammatory factors (TNF-α, IL-1β and IL-6), cytokines (IFN-γ and IL-4), IgE, GMCSF, and NGF. Naphazoline can be used for non-bacterial conjunctivitis research.
    Naphazoline
  • HY-176192
    SMU-14a
    Inhibitor
    SMU-14a is a TLR3 inhibitor (IC50: 0.18 µM). SMU-14a inhibits IL-6 secretion in mouse peritoneal macrophages and downregulates TNF-α in human peripheral blood monocytes. SMU-14a exerts anti-inflammatory effects by reducing the phosphorylation of p65, ERK, and TBK1 through NF-κB, MAPK, and IRF3 signaling pathways, and decreasing serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels. SMU-14a can be used in the study of acute hepatitis.
    SMU-14a
  • HY-N0722R
    Neochlorogenic acid (Standard)
    Inhibitor
    Neochlorogenic acid (Standard) is the analytical standard of Neochlorogenic acid. This product is intended for research and analytical applications. Neochlorogenic acid is a natural polyphenolic compound found in dried fruits and other plants. Neochlorogenic acid inhibits the production of TNF-α and IL-1β. Neochlorogenic acid suppresses iNOS and COX-2 protein expression. Neochlorogenic acid also inhibits phosphorylated NF-κB p65 and p38 MAPK activation.
    Neochlorogenic acid (Standard)
  • HY-163035
    EM-163
    Inhibitor
    EM-163 is a summative BB-Loop analog. EM-163 can alleviate inflammation and prevent death from toxic shock by targeting the TIR domain of MyD88. EM-163 can be used in the study of SEB poisoning (SEB: Staphylococcal enterotoxin B).
    EM-163
  • HY-P10399
    KGYY15
    Inhibitor
    KGYY15 (Mouse KGYY15) is a CD40 targeting peptide, which weakly inhibits the CD40-CD40L interaction with IC50 of more than 1mM. KGYY15 activates 33% NF-κB pathway at 100 μM.
    KGYY15
  • HY-U00179
    CDC801
    Inhibitor 98.94%
    CDC801 is a potent and orally active phosphodiesterase 4 (PDE4) and tumor necrosis factor-α (TNF-α) inhibitor with IC50 of 1.1 μM and 2.5 μM, respectively.
    CDC801
  • HY-P990269
    Anti-Mouse CD40L/CD154 (LALA-PG) Antibody (MR-1)
    Inhibitor
    Anti-Mouse CD40L/CD154 (LALA-PG) Antibody (MR-1) is a mouse-derived IgG2a κ type antibody inhibitor, targeting to mouse CD40L/CD154. Anti-Mouse CD40L/CD154 (LALA-PG) Antibody (MR-1) is a chimeric version of the original MR-1 antibody (HY-P990134). The variable domain sequences are identical to the original MR-1 but the constant region sequences have been switched from Armenian hamster IgG to mouse IgG2a. Anti-Mouse CD40L/CD154 (LALA-PG) Antibody (MR-1) contains a LALA-PG mutation in the Fc fragment rendering it unable to bind to endogenous Fcγ receptors. Anti-Mouse CD40L/CD154 (LALA-PG) Antibody (MR-1) blocks CD40/CD40L signaling. Anti-Mouse CD40L/CD154 (LALA-PG) Antibody (MR-1) can be used for researches of cancer, inflammation and immunology.
    Anti-Mouse CD40L/CD154 (LALA-PG) Antibody (MR-1)
  • HY-P991180
    TRX-518
    Ligand 98.58%
    TRX-518 is a humanized agonist antibody targeting glucocorticoid-induced tumor necrosis factor receptor (GITR). TRX-518 specifically targets GITR⁺ Tregs and CD45RA⁻Foxp3⁺ effector Tregs (eTregs) among regulatory T cells (Tregs), reducing the number of Tregs in circulation and within tumors. TRX-518 is promising for research of cancers.
    TRX-518
  • HY-N13184
    Giraldoid B
    Inhibitor 98.49%
    Giraldoid B is an active ingredient that can be isolated from Girald Daphne Bark. Giraldoid B can inhibit LPS induced NO and b>TNF-α production in RAW264.7 and has anti-inflammatory activity.
    Giraldoid B
  • HY-158650
    10-OAHSA
    Inhibitor 99.0%
    10-OAHSA is one of fatty acid esters of hydroxy fatty acids (FAHFAs). 10-POHSA increases glucose-stimulated insulin secretion (GSIS) at a high glucose concentration. 10-OAHSA reduces LPS (HY-D1056)-induced Tnf-α secretion in bone marrow-derived dendritic cells (BMDCs).
    10-OAHSA
  • HY-P991014
    Pamlectabart
    Inhibitor
    HY-P991014 is an TNFRSF17-targeting IgG1κ type humanized antibody, the recommed isotype control is Human IgG1 kappa, Isotype Control (HY-P99001).
    Pamlectabart
  • HY-152169
    BIHC
    Inhibitor ≥98.0%
    BIHC is a TNF blocker with anti-inflammatory activity. BIHC can significantly inhibit the proliferation of hepatocellular carcinoma (HCC) cells and exhibits potent cytotoxicity against the HepG2 cell line, capable of inducing cell apoptosis , while demonstrating relatively low toxicity towards normal hepatocytes. Additionally, BIHC can be used for research on inflammatory bowel disease (IBD).
    BIHC
  • HY-P991036
    Velinotamig
    Inhibitor 98.50%
    HY-P991036 is an CD3E/TNFRSF17-targeting H-γ1_L-κ/H-γ1_L-κ type bispecific antibody.
    Velinotamig
  • HY-W015515R
    L-Citronellol (Standard)
    Inhibitor
    L-Citronellol ((S)-3,7-Dimethyloct-6-en-1-ol) is an analytical standard for L-Citronellol (HY-W015515). This product is intended for research and analytical applications. L-Citronellol is a natural product with anti-allergic and neuroprotective effects. L-Citronellol inhibits mast cell activation and the release of inflammatory factors by inhibiting the ERK pathway. L-Citronellol inhibits BACE1/PSEN1 and AChE, reduces TNF-α expression and lipid peroxidation, demonstrating the potential of multi-target anti-Alzheimer's disease (AD).
    L-Citronellol (Standard)
  • HY-B0190B
    Nafamostat hydrochloride
    Nafamostat hydrochloride, an anticoagulant, is a synthetic serine protease inhibitor. Nafamostat hydrochloride has anticancer and antivirus effect. Nafamostat hydrochloride induces apoptosis by up-regulating the expression of tumor necrosis factor receptor-1 (TNFR1). Nafamostat hydrochloride can be used in the development of the pathological thickening of the arterial wall.
    Nafamostat hydrochloride
  • HY-P991179
    MK-4166
    Agonist 98.20%
    MK-4166 is a humanized IgG1 agonist monoclonal antibody targeting GITR. MK-4166 enhances the proliferation of both naïve and tumor-infiltrating T lymphocytes.
    MK-4166
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity

Following the binding of TNF to TNF receptors, TNFR1 binds to TRADD, which recruits RIPK1, TRAF2/5 and cIAP1/2 to form TNFR1 signaling complex I; TNFR2 binds to TRAF1/2 directly to recruit cIAP1/2. Both cIAP1 and cIAP2 are E3 ubiquitin ligases that add K63 linked polyubiquitin chains to RIPK1 and other components of the signaling complex. The ubiquitin ligase activity of the cIAPs is needed to recruit the LUBAC, which adds M1 linked linear polyubiquitin chains to RIPK1. K63 polyubiquitylated RIPK1 recruits TAB2, TAB3 and TAK1, which activate signaling mediated by JNK and p38, as well as the IκB kinase complex. The IKK complex then activates NF-κB signaling, which leads to the transcription of anti-apoptotic factors-such as FLIP and Bcl-XL-that promote cell survival. 

 

The formation of TNFR1 complex IIa and complex IIb depends on non-ubiquitylated RIPK1. For the formation of complex IIa, ubiquitylated RIPK1 in complex I is deubiquitylated by CYLD. This deubiquitylated RIPK1 dissociates from the membrane-bound complex and moves into the cytosol, where it interacts with TRADD, FADD, Pro-caspase 8 and FLIPL to form complex IIa. By contrast, complex IIb is formed when the RIPK1 in complex I is not ubiquitylated owing to conditions that have resulted in the depletion of cIAPs, which normally ubiquitylate RIPK1. This non-ubiquitylated RIPK1 dissociates from complex I, moves into the cytosol, and assembles with FADD, Pro-caspase 8, FLIPL and RIPK3 (but not TRADD) to form complex IIb. For either complex IIa or complex IIb to prevent necroptosis, both RIPK1 and RIPK3 must be inactivated by the cleavage activity of the Pro-caspase 8-FLIPL heterodimer or fully activated caspase 8. The Pro-caspase 8 homodimer generates active Caspase 8, which is released from complex IIa and complex IIb. This active Caspase 8 then carries out cleavage reactions to activate downstream executioner caspases and thus induce classical apoptosis. 

 

Formation of the complex IIc (necrosome) is initiated either by RIPK1 deubiquitylation mediated by CYLD or by RIPK1 non-ubiquitylation due to depletion of cIAPs, similar to complex IIa and complex IIb formation. RIPK1 recruits numerous RIPK3 molecules. They come together to form amyloid microfilaments called necrosomes. Activated RIPK3 phosphorylates and recruits MLKL, eventually leading to the formation of a supramolecular protein complex at the plasma membrane and necroptosis [1][2].

 

Reference:
[1]. Brenner D, et al. Regulation of tumour necrosis factor signalling: live or let die.Nat Rev Immunol. 2015 Jun;15(6):362-74. 
[2]. Conrad M, et al. Regulated necrosis: disease relevance and therapeutic opportunities.Nat Rev Drug Discov. 2016 May;15(5):348-66. 
 

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